Commit 3e3a5b8e authored by Hans Holmberg's avatar Hans Holmberg Committed by Jens Axboe

lightnvm: pblk: prevent gc kicks when gc is not operational

GC can be kicked after it has been shut down when closing the last
line during exit, resulting in accesses to freed structures.

Make sure that GC is not triggered while it is not operational.
Also make sure that GC won't be re-activated during exit when
running on another processor by using timer_del_sync.
Signed-off-by: default avatarHans Holmberg <hans.holmberg@cnexlabs.com>
Signed-off-by: default avatarMatias Bjørling <m@bjorling.me>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 22a4e061
......@@ -478,10 +478,10 @@ void pblk_gc_should_start(struct pblk *pblk)
{
struct pblk_gc *gc = &pblk->gc;
if (gc->gc_enabled && !gc->gc_active)
if (gc->gc_enabled && !gc->gc_active) {
pblk_gc_start(pblk);
pblk_gc_kick(pblk);
pblk_gc_kick(pblk);
}
}
/*
......@@ -620,7 +620,8 @@ void pblk_gc_exit(struct pblk *pblk)
flush_workqueue(gc->gc_reader_wq);
flush_workqueue(gc->gc_line_reader_wq);
del_timer(&gc->gc_timer);
gc->gc_enabled = 0;
del_timer_sync(&gc->gc_timer);
pblk_gc_stop(pblk, 1);
if (gc->gc_ts)
......
......@@ -931,6 +931,7 @@ static void *pblk_init(struct nvm_tgt_dev *dev, struct gendisk *tdisk,
pblk->dev = dev;
pblk->disk = tdisk;
pblk->state = PBLK_STATE_RUNNING;
pblk->gc.gc_enabled = 0;
spin_lock_init(&pblk->trans_lock);
spin_lock_init(&pblk->lock);
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment